Struct SharedSecret

pub struct SharedSecret(/* private fields */);

Enables two parties to create a shared secret without revealing their own secrets.

Examples

let s = Secp256k1::new();
let (sk1, pk1) = s.generate_keypair(&mut thread_rng());
let (sk2, pk2) = s.generate_keypair(&mut thread_rng());
let sec1 = SharedSecret::new(&pk2, &sk1);
let sec2 = SharedSecret::new(&pk1, &sk2);
assert_eq!(sec1, sec2);

Implementations

impl SharedSecret

pub fn display_secret(&self) -> DisplaySecret

Formats the explicit byte value of the shared secret kept inside the type as a little-endian hexadecimal string using the provided formatter.

This is the only method that outputs the actual shared secret value, and, thus, should be used with extreme caution.

Examples

use secp256k1::ecdh::SharedSecret;


let secret = SharedSecret::new(&pk, &sk);
// Here we explicitly display the secret value:
assert_eq!(
    format!("{}", secret.display_secret()),
    "cf05ae7da039ddce6d56dd57d3000c6dd91c6f1695eae47e05389f11e2467043"
);
// Also, we can explicitly display with `Debug`:
assert_eq!(
    format!("{:?}", secret.display_secret()),
    format!("DisplaySecret(\"{}\")", secret.display_secret())
);

impl SharedSecret

pub fn new(point: &PublicKey, scalar: &SecretKey) -> SharedSecret

Creates a new shared secret from a pubkey and secret key.

pub fn secret_bytes(&self) -> [u8; 32]

Returns the shared secret as a byte value.

pub fn from_bytes(bytes: [u8; 32]) -> SharedSecret

Creates a shared secret from bytes array.

pub fn from_slice(bytes: &[u8]) -> Result<SharedSecret, Error>

Creates a shared secret from bytes slice.

Trait Implementations

impl AsRef<[u8]> for SharedSecret

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<[u8]> for SharedSecret

fn borrow(&self) -> &[u8]

Immutably borrows from an owned value.

impl Clone for SharedSecret

fn clone(&self) -> SharedSecret

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SharedSecret

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl FromStr for SharedSecret

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<SharedSecret, Error>

Parses a string s to return a value of this type.

impl Hash for SharedSecret

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SharedSecret

fn cmp(&self, other: &SharedSecret) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SharedSecret

fn eq(&self, other: &SharedSecret) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SharedSecret

fn partial_cmp(&self, other: &SharedSecret) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for SharedSecret

impl Eq for SharedSecret

impl StructuralPartialEq for SharedSecret